Novel bicycle transmission mechanism

Abstract

The invention discloses a novel bicycle transmission mechanism, and belongs to the field of bicycles. The device comprises a pedal force arm, a balance arm, a chain wheel disc, a pedal force arm bearing seat, a pedal force arm angle control arm, a balance arm bearing seat, a connecting arm bearing seat and a left force arm, the chain wheel disc is fixedly installed on a middle shaft at the right side end of a bicycle frame, and the pedal force arm bearing seat is fixedly installed at the edge of the chain wheel disc; the pedal force arm is fixedly installed on the pedal force arm bearing seats, the balance arm is arranged at the upper end of the pedal force arm, the balance arm bearing seats are installed at the two ends of the balance arm respectively, and the pedal force arm angle control arms are fixedly connected to the two ends of the balance arm respectively. The other ends of the pedal force arm angle control arms are fixedly connected to connecting arm bearing seats fixedly installed on the right side of the bicycle frame, and the left force arm is fixedly installed at the left side end of the bicycle middle shaft. The problems that an existing bicycle is strenuous in riding and not high in speed are solved, and the riding efficiency of the bicycle can be improved by meeting the riding requirements of the legs of the human body.

Description

Technical Field

[0001] The invention relates to the technical field of bicycles, in particular to a novel bicycle transmission mechanism. Background Art

[0002] Currently, bicycles are developing more and more perfect, and various types of bicycles have made various improvements in terms of saving riding effort and increasing riding speed.

[0003] However, traditional bicycles still have the following problems in actual use: they are limited by the riding requirements of human legs and the structural restrictions of the bicycle frame, which limits the length of the bicycle pedal force arm to a certain extent, thereby restricting the development of more labor-saving bicycle riding; therefore, it does not meet the existing needs, and we have proposed a new bicycle transmission mechanism. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of bicycle transmission mechanism, which can adapt to the riding requirements of human legs, increase the length of the pedal force arm exponentially, and at the same time, further increase the diameter of the sprocket, so as to achieve the purpose of saving more effort and increasing the speed when riding a bicycle, and solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a novel bicycle transmission mechanism, comprising a pedal force arm, a balancing arm, a sprocket, a pedal force arm bearing seat, a pedal force arm angle control arm, a balancing arm bearing seat, a connecting arm bearing seat and a left force arm, the sprocket is fixedly mounted on the middle axis at the right end of the bicycle frame, the pedal force arm bearing seat is fixedly mounted at the edge of the sprocket, the pedal force arm is fixedly mounted on the pedal force arm bearing seat, a balancing arm is arranged at the upper end of the pedal force arm, the balancing arm bearing seats are respectively mounted at both ends of the balancing arm, the pedal force arm angle control arms are respectively fixedly connected to the two ends of the balancing arm, the other ends of the pedal force arm angle control arms are respectively fixedly connected to the connecting arm bearing seats fixedly mounted on the right side of the bicycle frame, and the left force arm is fixedly mounted on the left end of the middle axis of the bicycle.

[0006] The pedal lever arm is provided with a pedal fixing hole and a sprocket wheel fixed connecting shaft hole; the balance arm is provided with a bearing seat fixing hole and a shaft hole 1; the sprocket wheel is provided with a sprocket wheel center fixing shaft hole, a pedal lever arm shaft hole, a bearing seat fixing screw hole and a sprocket tooth; the pedal lever arm bearing seat is composed of a bearing seat 1 and a spacer 1, the bearing seat 1 is provided with a bearing mounting hole 1 and a fixing screw hole 1, the spacer 1 is provided with a shaft hole 2 and a fixing screw hole 2; the pedal lever arm angle control arm is provided with a shaft hole 3; the balance arm bearing seat is provided with a bearing mounting hole 1 and a fixing screw hole 1 ... Mounting hole two and fixing screw hole three, wherein the spacer used in the balancing arm bearing seat is replaced by the two ends of the balancing arm; the connecting arm bearing seat is composed of a bearing seat two and a spacer two, the bearing seat two is provided with a bearing mounting hole three and a fixing screw hole four, the spacer two is provided with an axial hole four and a fixing screw hole five; the left force arm is provided with a left force arm fixing axial hole, and at the same time, a left force arm bearing seat is welded and installed on the left force arm, and the left force arm bearing seat is provided with a spacer three, the left force arm bearing seat is provided with a bearing mounting hole four and a fixing screw hole six, the spacer three is provided with an axial hole five and a fixing screw hole seven.

[0007] Furthermore, one end of the pedal lever is fixedly connected to the edge of the sprocket through the second movable fixed point of the pedal lever bearing seat, and the pedal lever angle control arm, the left lever, the sprocket and the bicycle center axis are fixedly connected. Under the action and control of the sprocket and the bicycle center axis, the pedal lever and the footrest fixedly mounted on the pedal lever make an elliptical movement trajectory with controllable up and down, front and back angles in a small loop in front of the sprocket.

[0008] Furthermore, the pedal lever arm bearing seat is fixedly installed on the edge of the sprocket disk through fixing screw hole one, fixing screw hole two and the bearing seat fixing screw hole to serve as the second movable fixing point of the pedal lever arm. One end of the pedal lever arm is fixedly connected to the edge of the sprocket disk through the second movable fixing point of the pedal lever arm bearing seat. The pedal lever arm angle control arm, the left lever arm, the sprocket disk and the bicycle middle axis are fixedly connected. Under the action and control of the sprocket disk and the bicycle middle axis, the pedal lever arm and the footstool fixedly installed on the pedal lever arm make an elliptical movement trajectory with controllable up and down, front and back angles in a small loop in front of the sprocket disk.

[0009] Furthermore, when the pedal force arm bearing seat fixedly installed at the edge of the sprocket disk, the second movable fixed point of the left force arm bearing seat welded on the left force arm and various parts are connected and cooperated to work, the length of the pedal force arm increases exponentially, and at the same time, the diameter of the sprocket disk is also increased.

[0010] Compared with the prior art, the present invention has the following beneficial effects: When the first fixed point of the connecting arm bearing seat, the pedal force arm bearing seat, the second movable fixed point of the left force arm bearing seat, the pedal force arm, the balance arm, the pedal force arm angle control arm, the sprocket and the left force arm are connected to perform work, the length of the pedal force arm can be multiplied to meet the riding requirements of human legs. At the same time, the diameter of the sprocket can also be increased. Moreover, one end of the pedal force arm is fixedly connected to the edge of the sprocket through the second movable fixed point of the pedal force arm bearing seat. When performing work, the pedal force arm and the footstool fixedly installed on the pedal force arm can move in an elliptical trajectory with controllable up and down and front and back angles in a small cycle in front of the sprocket. The above design can improve the riding efficiency of the bicycle, thereby achieving the purpose of saving effort and increasing speed when riding the bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the pedal lever arm structure of the present invention; Figure 2 It is a schematic diagram of the sprocket structure of the present invention; Figure 3 It is a schematic diagram of the pedal arm bearing seat structure of the present invention; Figure 4 It is a schematic diagram of the structure of the pedal lever arm angle control arm of the present invention; Figure 5 It is a schematic diagram of the structure of the balance arm bearing seat of the present invention; Figure 6 It is a schematic diagram of the structure of the connecting arm bearing seat of the present invention; Figure 7 It is a schematic diagram of the left lever arm structure of the present invention; Figure 8 A diagram showing the installation of the novel bicycle transmission mechanism of the present invention on the right side of a bicycle; Fig. 9 This is a diagram showing the installation of the novel bicycle transmission mechanism of the present invention on the left side of a bicycle.

[0012] In the figure: 1. Pedal arm; 2. Pedal fixing hole; 3. Sprocket plate fixing connecting shaft hole; 4. Balance arm; 5. Bearing seat fixing hole; 6. Shaft hole 1; 7. Sprocket plate; 8. Sprocket plate center fixing shaft hole; 9. Pedal arm shaft hole; 10. Bearing seat fixing screw hole; 11. Sprocket teeth; 12. Pedal arm bearing seat; 13. Bearing seat 1; 14. Bearing mounting hole 1; 15. Fixing screw hole 1; 16. Spacer 1; 17. Shaft hole 2; 18. Fixing screw hole 2; 19. Pedal arm angle control arm; 20, shaft hole three; 21, balance arm bearing seat; 22, bearing mounting hole two; 23, fixing screw hole three; 24, connecting arm bearing seat; 25, bearing seat two; 26, bearing mounting hole three; 27, fixing screw hole four; 28, spacer two; 29, shaft hole four; 30, fixing screw hole five; 31, left force arm; 32, left force arm fixing shaft hole; 33, left force arm bearing seat; 34, bearing mounting hole four; 35, fixing screw hole six; 36, spacer three; 37, shaft hole five; 38, fixing screw hole seven. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] In order to solve the technical problem that the transmission mechanism of existing bicycles is limited, making the riding of bicycles laborious and slow, please refer to Figure 1-Figure 9 , this embodiment provides the following technical solutions: A novel bicycle transmission mechanism comprises a pedal force arm 1, a balancing arm 4, a sprocket 7, a pedal force arm bearing seat 12, a pedal force arm angle control arm 19, a balancing arm bearing seat 21, a connecting arm bearing seat 24 and a left force arm 31. The sprocket 7 is fixedly mounted on the middle axis at the right end of the bicycle frame, the pedal force arm bearing seat 12 is fixedly mounted at the edge of the sprocket 7, the pedal force arm 1 is fixedly mounted on the pedal force arm bearing seat 12, the upper end of the pedal force arm 1 is provided with a balancing arm 4, the balancing arm bearing seats 21 are respectively mounted on both ends of the balancing arm 4, the pedal force arm angle control arm 19 is respectively fixedly connected to the two ends of the balancing arm 4, the other end of the pedal force arm angle control arm 19 is respectively fixedly connected to the connecting arm bearing seat 24 fixedly mounted on the right side of the bicycle frame, and the left force arm 31 is fixedly mounted on the left end of the middle axis of the bicycle.

[0015] The connecting arm bearing seat 24 is composed of a second bearing seat 25 and a second spacer 28. The second bearing seat 25 is provided with a third bearing mounting hole 26 and a fourth fixing screw hole 27. The second spacer 28 is provided with a fourth shaft hole 29 and a fifth fixing screw hole 30.

[0016] The sprocket wheel 7 is provided with a sprocket wheel center fixing shaft hole 8, a pedal force arm shaft hole 9, a bearing seat fixing screw hole 10 and a sprocket tooth 11.

[0017] The pedal arm bearing seat 12 is composed of a bearing seat 13 and a spacer 16. The bearing seat 13 is provided with a bearing mounting hole 14 and a fixing screw hole 15, and the spacer 16 is provided with an axial hole 17 and a fixing screw hole 18.

[0018] The pedal lever arm 1 is provided with a pedal fixing hole 2 and a sprocket wheel fixed connection shaft hole 3.

[0019] A balancing arm 4 is provided with a bearing seat fixing hole 5 and an axle hole 6, and the pedal force arm 1 is provided with the balancing arm 4.

[0020] The pedal lever arm angle control arm 19 is provided with an axle hole three 20 thereon.

[0021] The balancing arm bearing seat 21 is provided with a second bearing mounting hole 22 and a third fixing screw hole 23 , wherein the spacer used in the balancing arm bearing seat 21 is replaced by the two ends of the balancing arm 4 .

[0022] Specifically, the spacer 28 is assembled between the two bearing seats 25, and the two-piece roller cone pressure bearings are respectively installed in the bearing mounting holes 3 26 of the bearing seats 25 on both sides of the spacer 28, and four groups are assembled in the above manner, and the four groups of assembled bearing seats are respectively fixed to the positions set at the left and right ends of the bicycle frame by screws through the fixing screw holes 4 27 and the fixing screw holes 5 30, so as to serve as the first fixing points of the left and right pedal force arms 1; The sprocket wheel 7 is fixedly mounted on the middle axis of the right end of the bicycle frame through the fixed shaft hole 8 in the center of the sprocket wheel, the spacer 16 is assembled between the two bearing seats 13, and the two-piece roller cone pressure bearings are respectively installed in the bearing mounting holes 14, and the pedal force arm bearing seat 12 assembled above is fixedly mounted on the edge of the sprocket wheel 7 with screws through the fixing screw hole 15, the fixing screw hole 2 18 and the bearing seat fixing screw hole 10, so as to serve as the second movable fixing point of the right pedal force arm 1; The pedal arm 1 is fixedly connected to the shaft hole 3 through the sprocket on the pedal arm 1 and fixedly mounted on the pedal arm bearing seat 12 by bolts. The two ends of the balance arm 4 are used as spacers. The balance arm bearing seats 21 (four in total) are respectively mounted on the two ends of the balance arm 4 through the bearing seat fixing hole 5 and the fixing screw hole three 23 with screws. The two-piece roller cone pressure bearings (four in total) are respectively mounted on the balance arm bearing seat 21 through the bearing mounting hole two 22. The pedal arm angle control arm 19 (two in total) is fixedly mounted on the pedal arm bearing seat 21 through the shaft hole three 20. The bolts are fixedly connected to the balance arm bearing seat 21 respectively, and the other end of the pedal force arm angle control arm 19 is fixedly connected to the first fixed point of the connecting arm bearing seat 24 fixedly installed on the right side of the bicycle frame by bolts through the shaft hole three 20. The bicycle pedal is fixedly installed on the pedal force arm 1 through the pedal fixing hole 2. The sprocket 7 can be meshed and connected with the bicycle flywheel by using the chain and the sprocket teeth 11 on the sprocket wheel 7. Through the above process, the new bicycle transmission mechanism of the present invention can be assembled and installed on the right side of the bicycle.

[0023] The left lever arm 31 is provided with a left lever arm fixing shaft hole 32. Meanwhile, a left lever arm bearing seat 33 is welded and installed on the left lever arm 31. The left lever arm bearing seat 33 is provided with a spacer three 36. The left lever arm bearing seat 33 is provided with a bearing mounting hole four 34 and a fixing screw hole six 35. The spacer three 36 is provided with a shaft hole five 37 and a fixing screw hole seven 38.

[0024] Specifically, the left force arm bearing seat 33 (two in total) is combined with the spacer three 36, and fixed with screws through the fixing screw holes 6 35 and the fixing screw holes 7 38. After fixing, the two-piece roller cone pressure bearings (two in total) are respectively installed in the bearing mounting holes 4 34. The left force arm bearing seat 33 assembled through the above process is welded to one end of the left force arm 31 as the second active fixing point of the pedal force arm 1. The assembled left force arm 31 is passed through the left force arm fixing shaft hole 32, and the left force arm 31 can be fixedly installed on the left end of the middle shaft of the bicycle. At the same time, during installation, the left force arm bearing seat 33 should be 180 degrees away from the installed pedal force arm bearing seat 12. The second active fixing point of the left force arm bearing seat 33 is fixedly installed on the pedal force arm 1 through the sprocket plate fixing connecting shaft hole 3 with bolts. The two ends of the balance arm 4 are used as spacers, and the balance arm bearing seats 21 (four in total) are fixedly installed on the two ends of the balance arm 4 by screws through the fixing screw holes 3 23 and the bearing seat fixing holes 5, and the two-piece roller cone pressure bearings (four in total) are respectively installed in the bearing mounting holes 22, and one end of the pedal force arm angle control arm 19 (two in total) can be fixedly installed on the balance arm bearing seats 21 at both ends of the balance arm 4 through the shaft holes 3 20 by bolts, and the other end of the pedal force arm angle control arm 19 can be fixedly connected to the first fixed point of the connecting arm bearing seat 24 fixedly installed on the left side of the bicycle frame through the shaft holes 3 20 by bolts, and the bicycle pedal is fixedly installed on the pedal force arm 1 through the pedal fixing holes 2. Through the above process, the new bicycle transmission mechanism of the present invention can be assembled and installed on the left side of the bicycle.

[0025] The pedal lever arm bearing seat 12 is fixedly installed on the edge of the sprocket 7 through the fixing screw hole 15, the fixing screw hole 2 18 and the bearing seat fixing screw hole 10 to serve as the second movable fixing point of the pedal lever arm 1. One end of the pedal lever arm 1 is fixedly connected to the edge of the sprocket 7 through the second movable fixing point of the pedal lever arm bearing seat 12. The pedal lever arm angle control arm 19, the left lever 31, the sprocket 7 and the bicycle middle axis are fixedly connected. Under the action and control of the sprocket 7 and the bicycle middle axis, the pedal lever arm 1 and the footstool fixedly installed on the pedal lever arm 1 make an elliptical movement trajectory with controllable up and down, front and back angles in a small cycle in front of the sprocket 7.

[0026] The left lever arm bearing seat 33 is welded to one end of the left lever arm 31 to serve as the second movable fixed point of the pedal lever arm 1. The edge of the sprocket wheel 7 is fixedly mounted on the pedal lever arm bearing seat 12 and the second movable fixed point of the left lever arm bearing seat 33. The pedal lever arm 1 is provided with a balance arm 4.

[0027] When the pedal lever arm bearing seat 12 fixedly installed at the edge of the sprocket 7 and the second movable fixed point of the left lever arm bearing seat 33 welded on the left lever arm 31 are connected and cooperated with various parts to work, the length of the pedal lever arm 1 is multiplied, and at the same time, the diameter of the sprocket 7 is also increased.

[0028] Technical effects of the above content: The left lever arm 31 and the left lever arm bearing seat 33 used in the novel bicycle transmission mechanism of the present invention are welded together and can be processed into one piece in actual production. Meanwhile, in actual use, the left lever arm 31 can be replaced with a gear plate and a wheel plate according to the situation.

[0029] When the length of the pedal lever arm 1 is adapted to the riding requirements of human legs, the length of the pedal lever arm 1 can be multiplied according to design requirements.

[0030] When the first fixed point of the connecting arm bearing seat 24, the pedal force arm bearing seat 12, the second movable fixed point of the left force arm bearing seat 33, the pedal force arm 1, the balance arm 4, the pedal force arm angle control arm 19, the sprocket 7 and the left force arm 31 used in the new bicycle transmission mechanism of the present invention are connected and work is done, the pedal force arm 1 and the fixedly installed footstool can be formed in front of the sprocket 7 and move up and down and forward and backward in a small cycle, which solves the problem that the pedal force arm 1 that is too long cannot be used on the bicycle to meet the requirements of human leg riding, and the sprocket 7 that is too large in diameter cannot be used.

[0031] In the novel bicycle transmission mechanism of the present invention, one end of the pedal lever arm 1 is fixedly connected between the shaft hole 3 and the second movable fixed point of the pedal lever arm bearing seat 12 through a sprocket, which can achieve the effect of saving effort during riding.

[0032] The novel bicycle transmission mechanism of the present invention can be applied to various machines that perform work by human power or wind power.

[0033] The novel bicycle transmission mechanism of the present invention is applied to various electric vehicle transmission systems and oil-electric hybrid transmission systems, which can improve the output torque of the motor, increase the vehicle speed, reduce the current consumption, and charge the battery during driving, thereby reducing energy consumption and increasing the range.

[0034] The working principle of the new bicycle transmission mechanism of the present invention is as follows: when the pedal is pedaled downward to drive the pedal arm 1 to do work, the pedal arm angle control arm 19 can be driven to rotate around the first fixed point of the connecting arm bearing seat 24 through the pedal arm 1 and the balance arm 4, and the balance arm 4, the pedal arm 1 and the pedal fixedly installed thereon are controlled to move forward and backward in a small circular shape in front of the sprocket wheel 7 through a push-pull action during the rotational movement. At the same time, when the pedal arm 1 moves downward, the sprocket wheel 7 can be driven to rotate through the second active fixed point of the pedal arm bearing seat 12 fixedly installed on the edge of the sprocket wheel 7, and the angle and forward and backward movement distance of the pedal arm 1 during movement are jointly controlled through the second active fixed point of the pedal arm bearing seat 12. At the same time, the sprocket teeth 11 on the sprocket wheel 7 are meshed with the bicycle flywheel by the chain, thereby driving the flywheel and the wheel to do work. At the same time, it is also fixedly connected to the right side end of the bicycle middle shaft through the sprocket wheel 7, thereby driving the right side end of the middle shaft. The left lever arm 31 and the second movable fixed point of the left lever arm bearing seat 33 drive the pedal lever arm 1 fixedly connected thereto and the pedal fixedly installed thereto to move from the lower dead center position to the upper dead center position, and during the movement, the pedal lever arm angle control arm 19 fixedly connected thereto is driven by the balance arm 4 to rotate around the first fixed point of the connecting arm bearing seat 24 fixedly installed on the left side of the bicycle frame, and during the rotational movement, the push-pull action is used to jointly control the angular distance of the pedal lever arm 1 when it moves upward and the distance moved backward. When the right side pedal of the bicycle and the second movable fixed point of the pedal lever arm bearing seat 12 reach the lower dead center position, the left side pedal of the bicycle and the second movable fixed point of the left lever arm bearing seat 33 also reach the upper dead center position. At this time, a working process is completed. Through the continuous up and down reciprocating work of the pedal lever arms 1 on the left and right sides of the bicycle and the coordinated work of each connecting mechanism, the continuous and complete working process of the new bicycle transmission mechanism of the present invention on the bicycle is completed.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel bicycle transmission mechanism, comprising a pedal arm (1), a balance arm (4), a sprocket (7), a pedal arm bearing seat (12), a pedal arm angle control arm (19), a balance arm bearing seat (21), a connecting arm bearing seat (24) and a left arm (31), characterized in that: The sprocket wheel (7) is fixedly mounted on the middle axis at the right end of the bicycle frame, the pedal arm bearing seat (12) is fixedly mounted on the edge of the sprocket wheel (7), the pedal arm (1) is fixedly mounted on the pedal arm bearing seat (12), a balancing arm (4) is arranged at the upper end of the pedal arm (1), the balancing arm bearing seats (21) are respectively mounted on the two ends of the balancing arm (4), the pedal arm angle control arm (19) is respectively fixedly connected to the two ends of the balancing arm (4), the other end of the pedal arm angle control arm (19) is respectively fixedly connected to the connecting arm bearing seat (24) fixedly mounted on the right side of the bicycle frame, and the left arm (31) is fixedly mounted on the left end of the middle axis of the bicycle; The pedal lever arm (1) is provided with a pedal fixing hole (2) and a sprocket wheel fixed connecting shaft hole (3); the balance arm (4) is provided with a bearing seat fixing hole (5) and a shaft hole (6); the sprocket wheel (7) is provided with a sprocket wheel center fixing shaft hole (8), a pedal lever arm shaft hole (9), a bearing seat fixing screw hole (10) and a sprocket tooth (11); the pedal lever arm bearing seat (12) is composed of a bearing seat (13) and a spacer (16); the bearing seat (13) is provided with a bearing mounting hole (14) and a fixing screw hole (15); the spacer (16) is provided with a shaft hole (17) and a fixing screw hole (18); the pedal lever arm angle control arm (19) is provided with a shaft hole (20); the balance arm bearing seat (21) is provided with a bearing mounting hole (22) and fixing screw hole three (23), wherein the spacer used in the balance arm bearing seat (21) is replaced by the two ends of the balance arm (4); the connecting arm bearing seat (24) is composed of a bearing seat two (25) and a spacer two (28), the bearing seat two (25) is provided with a bearing mounting hole three (26) and a fixing screw hole four (27), and the spacer two (28) is provided with an axial hole four (29) and a fixing screw hole five (30); the left force arm (31) is provided with a left force arm fixing axial hole (32), and at the same time, a left force arm bearing seat (33) is welded and installed on the left force arm (31), and the left force arm bearing seat (33) is provided with a spacer three (36), the left force arm bearing seat (33) is provided with a bearing mounting hole four (34) and a fixing screw hole six (35), and the spacer three (36) is provided with an axial hole five (37) and a fixing screw hole seven (38).

2. The novel bicycle transmission mechanism according to claim 1 is characterized in that: The pedal arm bearing seat (12) is fixedly mounted on the edge of the sprocket (7) via a first fixing screw hole (15), a second fixing screw hole (18) and a bearing seat fixing screw hole (10) to serve as a second movable fixing point of the pedal arm (1); one end of the pedal arm (1) is fixedly connected to the edge of the sprocket (7) via the second movable fixing point of the pedal arm bearing seat (12); the pedal arm angle control arm (19), the left arm (31), the sprocket (7) and the bicycle center axis are fixedly connected; under the action and control of the sprocket (7) and the bicycle center axis, the pedal arm (1) and the footrest fixedly mounted on the pedal arm (1) move in a small loop in front of the sprocket (7) in an elliptical trajectory with a controllable up and down, front and back angle.

3. The novel bicycle transmission mechanism according to claim 1 is characterized in that: The left lever arm bearing seat (33) is welded to one end of the left lever arm (31) to serve as a second movable fixing point of the pedal lever arm (1). The edge of the sprocket wheel (7) is fixedly mounted on the pedal lever arm bearing seat (12) and the second movable fixing point of the left lever arm bearing seat (33). The pedal lever arm (1) is provided with a balancing arm (4).

4. The novel bicycle transmission mechanism according to claim 3 is characterized in that: When the pedal lever arm bearing seat (12) fixedly mounted at the edge of the sprocket wheel (7) and the second movable fixed point of the left lever arm bearing seat (33) welded on the left lever arm (31) are connected and cooperated with various parts to perform work, the length of the pedal lever arm (1) increases exponentially, and at the same time, the diameter of the sprocket wheel (7) is also increased.

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